package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;

import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.sky.service.WorkspaceService;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @param
 * @return
 */
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 统计指定时间区间内的营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate>dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        String s = StringUtils.join(dateList, ",");
        //存放金额
        List<Double>turnoverList=new ArrayList<>();
        for(LocalDate date:dateList){
            //查询date日期对应的日期已完成订单总额
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover=turnover==null?0.0:turnover;
            turnoverList.add(turnover);
        }
        return TurnoverReportVO.builder().dateList(s).turnoverList(StringUtils.join(turnoverList,",")).build();
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate>dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存新增用户数量
        List<Integer>newUserList=new ArrayList<>();
        //存每天总用户数量
        List<Integer>totalUserList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
            Map map=new HashMap();
            map.put("end",endTime);
            //总用户数量
            Integer totalUser=userMapper.countByMap(map);
            //新增用户数量
            map.put("begin",beginTime);
            Integer newUser=userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO.builder().dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,",")).build();

    }

    /**
     * 指定时间订单数据统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate>dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天订单总数
        List<Integer>orderCountList=new ArrayList<>();
        List<Integer>validOrderCountList=new ArrayList<>();
        //遍历datelist集合查询每天的有效订单数和订单总数
        for(LocalDate date:dateList){
            //查询每天的订单总数
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            //查询每天的有效订单数
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //计算订单完成率
        Double orderCompletionRate=0.0;
        if(totalOrderCount!=0)
        orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;

        return OrderReportVO.builder().dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate).build();
    }
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        Integer integer = orderMapper.countByMap(map);
        return integer;
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime=LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime =LocalDateTime.of(end,LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> nameList = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberList,","))
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库，获取营业数据，查询近三十天数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        LocalDateTime begin = LocalDateTime.of(dateBegin, LocalTime.MIN);
        LocalDateTime end = LocalDateTime.of(dateEnd, LocalTime.MAX);
        //查询概览数据
        BusinessDataVO businessData = workspaceService.getBusinessData(begin, end);
        //通过POI将数据库写入Excel中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        //基于模板文件创建一个新的Exceli
        try {
            XSSFWorkbook excel=new XSSFWorkbook(in);
            //获取表格标签页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            //填充数据时间
            sheet.getRow(1).getCell(1).setCellValue("时间"+dateBegin+"至"+dateEnd);
            sheet.getRow(3).getCell(2).setCellValue(businessData.getTurnover());
            sheet.getRow(3).getCell(4).setCellValue(businessData.getOrderCompletionRate());
            sheet.getRow(3).getCell(6).setCellValue(businessData.getNewUsers());
            //第五行
            XSSFRow row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            //填充明细数据
            for(int i=0;i<30;i++){
                LocalDate date=dateBegin.plusDays(i);
                //查询某一天的数据
                BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime
                        .of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData1.getTurnover());
                row.getCell(3).setCellValue(businessData1.getValidOrderCount());
                row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData1.getUnitPrice());
                row.getCell(6).setCellValue(businessData1.getNewUsers());
            }
            //excel下载到客户端
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);
            outputStream.close();
            excel.close();

        } catch (IOException e) {
            e.printStackTrace();
        }


    }
}
